Home / 1,403.78-2,091.66-1,340.90

Finding the Fourth Proportional to 1,403.78, 2,091.66 and 1,340.90

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Solution

The fourth proportional to 1,403.78, 2,091.66 and 1,340.90 is: 1,997.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,403.78 : 2,091.66 = 1,340.90 : x
  2. Step 2: Convert to fraction form
    1,403.78/2,091.66 = 1,340.90/x
  3. Step 3: Cross multiply
    1,403.78x = 2,091.66 × 1,340.90
  4. Step 4: Simplify right side
    1,403.78x = 2,804,716.67
  5. Step 5: Solve for x
    x = 2,804,716.67/1,403.78
  6. Step 6: Final answer
    x = 1,997.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.